Photographic plate or film holder.



No. 830,950. PATENTED SEPT. l1, 1906. G. WISHRT.

PHOTOGRAPHIC PLATE 0R PILM HOLDER.

APPLICATION FILED FEB. 6.1906.

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GL WISHART. ,PHOTOGRAPHIG PLATE 0R FILM HOLDER.

APPLICATION FILED FEB. E. 1906.

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UNITED STATES vPATENT onirica.

PHOTOGRAPHIC PLATE OR FILM HOLDER.

Specification of Letters Patent,

Patented Sept. 11, 1906.

Application filed February 6, 1906. Serial lo. 299,755.

To a/ZZ whom it may concern:

Be it known that I, GEORGE WIsHRr, camera-inaker, a subject of the Kingof Great Britain and Ireland, and a resident of Cambuslang, Scotland,have invented a certain Photographic Plate or Film Holder, of which thefollowing is a specification, and for which I have obtained a patent inGreat Britain, No. 15,958, bearing date August 4, 1905.

This invention has reference to means for carrying and exposing drysensitive photographic plates or films in the camera, and comprisesimprovements in plate-holders and light-tight envelops, according towhich sensitive plates or films may be placed within the envelops in anyordinary dark room, may be carried in the pocket of the user or in anyconvenient manner, and after exposure in the camera be returned to thepocket to be afterward developed in the dark room.

In order that others skilled in the art to which my invention relatesmay understand how the saine is to be carried into effect or practice, Ihave hereunto appended two sheets of drawings, in which- Figure 1 is aperspective view of a plateholder for exposing plates or films in thecamera with the hinged door open. Fig. 2 is a longitudinal section ofsame with the sliding door open. Both are empty. Fig. 3 is a side viewof the upper part of a plateholder. Fig. 4 is an edge view of same. Fig.5 is a plan of the inner envelop with the plate or film inserted. Fig. 6is a plan of same, showing the covering paper sheet partly drawn overthe film. Fig. 7 illustrates the form of the covering-sheet when platesare used. Fig. 8 shows the inner envelop partly inserted in the outerenvelop. Fig. 9 shows the other side of envelop. Fig. l() illustratesthe mode of use.

Referring to Figs. l to 4, ais a rectangular frame grooved for slidinginto the camera and fitted with a sliding door l), made flexible in theusual manner, and a hinged door c, which is opened when it is desired toinsert a plate or film inclosed in a light-tight envelop. The slidingdoor is made flexible in the well-known manner illustrated and is formedwith a transverse groove d, which receives and engages with the woodenbar n, Fig. 8, secured on the outer cover of the lighttight envelop whenthis is placed within the plate-holder. The hinged door c is fitted witha compensating spring-plate e, which presses on the envelop to keep itin position whether it contains a plate or a thinner film. This plate eis carried by springs f, and holes g are formed in the plate to permitof access to the screws securing the springs. A springsupportedcross-bar 7L, faced with velvet, is fitted to make a light-tight jointwith the door b when the plate or ilmis inserted. A notch 'i is formedin the plate e, in which a small adjusting and wearing plate j issecured to engage with the block w, Fig. 9, on the inner envelop 1 toprevent it being drawn out when the door b is drawn out to pull out theouter envelo u along with it. The hinged door c is he d in its closedposition by the spring-plate Z, secured at m m to the door and engagingwith the stop-pieces n. To open the door c, the spring-plate l ispressed down at its center art, a part of the door c` being cutaway to alow of this action, which raises the ends high enough to clear thestop-pieces n and allow the door to open. The ring o is for the purposeof giving the thumb a hold while sliding the holder into and out of thecamera. p is a bar to act as a stop when closing the door b.

Referring to Figs. 5 to 9, Figs. 5 and 6 illustrate the inner envelop g,having the plate or film r laced in position. This envelop consists o asheet of stiff paper having three edges turned over to form a groove,into which the covering-sheet s, of stiff paper, is slipped over theplate. A tongue-piece t, also of paper, is used to prevent the platecoming out. When a plate is used, it is preferred instead of insertingthe covering-sheet s in the side grooves to make it slide on the top ofthem, in which case the covering-sheet s is formed with a fiap y, suchas is shown by Fig. 7, to facilitate the entry of its inner end into theend groove of the inner envelop.

Figs. 8 and 9 illustrate the two sides of the outer envelop u, intowhich the inner envelop g is slipped. As stated, the bar o engages withthe groove d in the door b of the dark cell and the block w with thenotch fi in the plate e on door c. The paper of the outer envelop iscreased on both sides to enable it to bend along with the fiexible door.The bar i; is beveled on one side to assist it to slide over the endgroove of the inner envelop without catching on it and also to form alight-tight joint.

In use the plate or iihn is placed in the inner envelop q and thecovering-sheet s slipped over it. The inner envelop is then slipped IOOIOS

IIO

Within the outer envelop u, the open end first,

and pressed in until the block w enters the d, and the door shut. Thecell being placed in the camera, the exposure is made by drawing thedoor b and the outer envelop u also, also the cover s ripped together asshown by Fig. 10. hen exposed, the door is returned, and the outerenvelop again covers the plate, which may then be removed in its envelopand placed in users ocket and another one be placed in the dar cell.

What I claim is- 1. In means for carrying and ex osing dry sensitivephotographic plates or ms in the camera, the combination comprising aplateholder fitted With a flexible slldingA door having a transversegroove therein, a hinged door fitted with a spring-actuated plate on itsinner side having a notch'therein, also a s ring-actuated cross-bar tomake, a light-tight joint, and a duplex envelop comprising an 'innerenvelop With sliding covering-sheet and a block thereon to engage withthe notch in the springlate, and an outer creased envelo with a eveledblock thereon to engage with the transverse groove in the sliding doorsubstantially as herein set forth. 2. In means for carrying and ex osingdry sensitive photographic plates or ii ms in the camera a late-ho derfor use With a lighttight enve op of the kind described comprising incombination a rectangular frame tted with a flexible sliding door havinga transverse groove therein, a hinged door, held in its closed positionby a spring-catch, having a spring-actuated plate on its inner side witha notch therein, also a spring-actuated plate to make a light-tightjoint, substantially as set forth.

3. In means for carrying and eX osing dry sensitive photogra hic platesor ms inthe camera a plate-ho der com rising in combination arectangular frame tted with a fiexible sliding door having a transversegroove therein, a hinged door, having a spring-actuated plate on itsinner side' with a notch therein, also a spring-actuated bar to make alight-tight joint, substantially asset forth.

4. In means for carrying and exposing dry sensitive photographic platesor films the combination With a plate-holder having a hinged door fittedWith a spring-actuated plate of a securin spring-p ate secured on theouter edge of te door and engaging With stops on the holdersubstantially as set forth.

5. In means for carrying and exposing dry sensitive hotographic platesor lms in a camera, t e combination of a plate-holder having a hingeddoor provided with a notch, a dup ex light-tight envelop having an innergrooved envelop With sliding covering-sheet having a block thereon whichengages said notch, an outer envelop creased to bend and rovided with abeveled block, and a flexi- Ele sliding door for the plate-holder havinga groove to receive said beveled block, substantially as set forth.

In testimony whereof I have signed my name to this specificationin thepresence of tWo subscribing Witnesses.

GEORGE WISHART.

Witnesses:

R. C. THOMSON, WM. RUTHERFORD.

